aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/scsi/libsas/sas_discover.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/scsi/libsas/sas_discover.c')
-rw-r--r--drivers/scsi/libsas/sas_discover.c402
1 files changed, 8 insertions, 394 deletions
diff --git a/drivers/scsi/libsas/sas_discover.c b/drivers/scsi/libsas/sas_discover.c
index a65598b1e536..6ac9f61d006a 100644
--- a/drivers/scsi/libsas/sas_discover.c
+++ b/drivers/scsi/libsas/sas_discover.c
@@ -55,149 +55,6 @@ void sas_init_dev(struct domain_device *dev)
55 } 55 }
56} 56}
57 57
58static void sas_task_timedout(unsigned long _task)
59{
60 struct sas_task *task = (void *) _task;
61 unsigned long flags;
62
63 spin_lock_irqsave(&task->task_state_lock, flags);
64 if (!(task->task_state_flags & SAS_TASK_STATE_DONE))
65 task->task_state_flags |= SAS_TASK_STATE_ABORTED;
66 spin_unlock_irqrestore(&task->task_state_lock, flags);
67
68 complete(&task->completion);
69}
70
71static void sas_disc_task_done(struct sas_task *task)
72{
73 if (!del_timer(&task->timer))
74 return;
75 complete(&task->completion);
76}
77
78#define SAS_DEV_TIMEOUT 10
79
80/**
81 * sas_execute_task -- Basic task processing for discovery
82 * @task: the task to be executed
83 * @buffer: pointer to buffer to do I/O
84 * @size: size of @buffer
85 * @pci_dma_dir: PCI_DMA_...
86 */
87static int sas_execute_task(struct sas_task *task, void *buffer, int size,
88 int pci_dma_dir)
89{
90 int res = 0;
91 struct scatterlist *scatter = NULL;
92 struct task_status_struct *ts = &task->task_status;
93 int num_scatter = 0;
94 int retries = 0;
95 struct sas_internal *i =
96 to_sas_internal(task->dev->port->ha->core.shost->transportt);
97
98 if (pci_dma_dir != PCI_DMA_NONE) {
99 scatter = kzalloc(sizeof(*scatter), GFP_KERNEL);
100 if (!scatter)
101 goto out;
102
103 sg_init_one(scatter, buffer, size);
104 num_scatter = 1;
105 }
106
107 task->task_proto = task->dev->tproto;
108 task->scatter = scatter;
109 task->num_scatter = num_scatter;
110 task->total_xfer_len = size;
111 task->data_dir = pci_dma_dir;
112 task->task_done = sas_disc_task_done;
113
114 for (retries = 0; retries < 5; retries++) {
115 task->task_state_flags = SAS_TASK_STATE_PENDING;
116 init_completion(&task->completion);
117
118 task->timer.data = (unsigned long) task;
119 task->timer.function = sas_task_timedout;
120 task->timer.expires = jiffies + SAS_DEV_TIMEOUT*HZ;
121 add_timer(&task->timer);
122
123 res = i->dft->lldd_execute_task(task, 1, GFP_KERNEL);
124 if (res) {
125 del_timer(&task->timer);
126 SAS_DPRINTK("executing SAS discovery task failed:%d\n",
127 res);
128 goto ex_err;
129 }
130 wait_for_completion(&task->completion);
131 res = -ETASK;
132 if (task->task_state_flags & SAS_TASK_STATE_ABORTED) {
133 int res2;
134 SAS_DPRINTK("task aborted, flags:0x%x\n",
135 task->task_state_flags);
136 res2 = i->dft->lldd_abort_task(task);
137 SAS_DPRINTK("came back from abort task\n");
138 if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) {
139 if (res2 == TMF_RESP_FUNC_COMPLETE)
140 continue; /* Retry the task */
141 else
142 goto ex_err;
143 }
144 }
145 if (task->task_status.stat == SAM_BUSY ||
146 task->task_status.stat == SAM_TASK_SET_FULL ||
147 task->task_status.stat == SAS_QUEUE_FULL) {
148 SAS_DPRINTK("task: q busy, sleeping...\n");
149 schedule_timeout_interruptible(HZ);
150 } else if (task->task_status.stat == SAM_CHECK_COND) {
151 struct scsi_sense_hdr shdr;
152
153 if (!scsi_normalize_sense(ts->buf, ts->buf_valid_size,
154 &shdr)) {
155 SAS_DPRINTK("couldn't normalize sense\n");
156 continue;
157 }
158 if ((shdr.sense_key == 6 && shdr.asc == 0x29) ||
159 (shdr.sense_key == 2 && shdr.asc == 4 &&
160 shdr.ascq == 1)) {
161 SAS_DPRINTK("device %016llx LUN: %016llx "
162 "powering up or not ready yet, "
163 "sleeping...\n",
164 SAS_ADDR(task->dev->sas_addr),
165 SAS_ADDR(task->ssp_task.LUN));
166
167 schedule_timeout_interruptible(5*HZ);
168 } else if (shdr.sense_key == 1) {
169 res = 0;
170 break;
171 } else if (shdr.sense_key == 5) {
172 break;
173 } else {
174 SAS_DPRINTK("dev %016llx LUN: %016llx "
175 "sense key:0x%x ASC:0x%x ASCQ:0x%x"
176 "\n",
177 SAS_ADDR(task->dev->sas_addr),
178 SAS_ADDR(task->ssp_task.LUN),
179 shdr.sense_key,
180 shdr.asc, shdr.ascq);
181 }
182 } else if (task->task_status.resp != SAS_TASK_COMPLETE ||
183 task->task_status.stat != SAM_GOOD) {
184 SAS_DPRINTK("task finished with resp:0x%x, "
185 "stat:0x%x\n",
186 task->task_status.resp,
187 task->task_status.stat);
188 goto ex_err;
189 } else {
190 res = 0;
191 break;
192 }
193 }
194ex_err:
195 if (pci_dma_dir != PCI_DMA_NONE)
196 kfree(scatter);
197out:
198 return res;
199}
200
201/* ---------- Domain device discovery ---------- */ 58/* ---------- Domain device discovery ---------- */
202 59
203/** 60/**
@@ -255,6 +112,7 @@ static int sas_get_port_device(struct asd_sas_port *port)
255 112
256 switch (dev->dev_type) { 113 switch (dev->dev_type) {
257 case SAS_END_DEV: 114 case SAS_END_DEV:
115 case SATA_DEV:
258 rphy = sas_end_device_alloc(port->port); 116 rphy = sas_end_device_alloc(port->port);
259 break; 117 break;
260 case EDGE_DEV: 118 case EDGE_DEV:
@@ -265,7 +123,6 @@ static int sas_get_port_device(struct asd_sas_port *port)
265 rphy = sas_expander_alloc(port->port, 123 rphy = sas_expander_alloc(port->port,
266 SAS_FANOUT_EXPANDER_DEVICE); 124 SAS_FANOUT_EXPANDER_DEVICE);
267 break; 125 break;
268 case SATA_DEV:
269 default: 126 default:
270 printk("ERROR: Unidentified device type %d\n", dev->dev_type); 127 printk("ERROR: Unidentified device type %d\n", dev->dev_type);
271 rphy = NULL; 128 rphy = NULL;
@@ -292,207 +149,15 @@ static int sas_get_port_device(struct asd_sas_port *port)
292 port->disc.max_level = 0; 149 port->disc.max_level = 0;
293 150
294 dev->rphy = rphy; 151 dev->rphy = rphy;
295 spin_lock(&port->dev_list_lock); 152 spin_lock_irq(&port->dev_list_lock);
296 list_add_tail(&dev->dev_list_node, &port->dev_list); 153 list_add_tail(&dev->dev_list_node, &port->dev_list);
297 spin_unlock(&port->dev_list_lock); 154 spin_unlock_irq(&port->dev_list_lock);
298 155
299 return 0; 156 return 0;
300} 157}
301 158
302/* ---------- Discover and Revalidate ---------- */ 159/* ---------- Discover and Revalidate ---------- */
303 160
304/* ---------- SATA ---------- */
305
306static void sas_get_ata_command_set(struct domain_device *dev)
307{
308 struct dev_to_host_fis *fis =
309 (struct dev_to_host_fis *) dev->frame_rcvd;
310
311 if ((fis->sector_count == 1 && /* ATA */
312 fis->lbal == 1 &&
313 fis->lbam == 0 &&
314 fis->lbah == 0 &&
315 fis->device == 0)
316 ||
317 (fis->sector_count == 0 && /* CE-ATA (mATA) */
318 fis->lbal == 0 &&
319 fis->lbam == 0xCE &&
320 fis->lbah == 0xAA &&
321 (fis->device & ~0x10) == 0))
322
323 dev->sata_dev.command_set = ATA_COMMAND_SET;
324
325 else if ((fis->interrupt_reason == 1 && /* ATAPI */
326 fis->lbal == 1 &&
327 fis->byte_count_low == 0x14 &&
328 fis->byte_count_high == 0xEB &&
329 (fis->device & ~0x10) == 0))
330
331 dev->sata_dev.command_set = ATAPI_COMMAND_SET;
332
333 else if ((fis->sector_count == 1 && /* SEMB */
334 fis->lbal == 1 &&
335 fis->lbam == 0x3C &&
336 fis->lbah == 0xC3 &&
337 fis->device == 0)
338 ||
339 (fis->interrupt_reason == 1 && /* SATA PM */
340 fis->lbal == 1 &&
341 fis->byte_count_low == 0x69 &&
342 fis->byte_count_high == 0x96 &&
343 (fis->device & ~0x10) == 0))
344
345 /* Treat it as a superset? */
346 dev->sata_dev.command_set = ATAPI_COMMAND_SET;
347}
348
349/**
350 * sas_issue_ata_cmd -- Basic SATA command processing for discovery
351 * @dev: the device to send the command to
352 * @command: the command register
353 * @features: the features register
354 * @buffer: pointer to buffer to do I/O
355 * @size: size of @buffer
356 * @pci_dma_dir: PCI_DMA_...
357 */
358static int sas_issue_ata_cmd(struct domain_device *dev, u8 command,
359 u8 features, void *buffer, int size,
360 int pci_dma_dir)
361{
362 int res = 0;
363 struct sas_task *task;
364 struct dev_to_host_fis *d2h_fis = (struct dev_to_host_fis *)
365 &dev->frame_rcvd[0];
366
367 res = -ENOMEM;
368 task = sas_alloc_task(GFP_KERNEL);
369 if (!task)
370 goto out;
371
372 task->dev = dev;
373
374 task->ata_task.fis.command = command;
375 task->ata_task.fis.features = features;
376 task->ata_task.fis.device = d2h_fis->device;
377 task->ata_task.retry_count = 1;
378
379 res = sas_execute_task(task, buffer, size, pci_dma_dir);
380
381 sas_free_task(task);
382out:
383 return res;
384}
385
386static void sas_sata_propagate_sas_addr(struct domain_device *dev)
387{
388 unsigned long flags;
389 struct asd_sas_port *port = dev->port;
390 struct asd_sas_phy *phy;
391
392 BUG_ON(dev->parent);
393
394 memcpy(port->attached_sas_addr, dev->sas_addr, SAS_ADDR_SIZE);
395 spin_lock_irqsave(&port->phy_list_lock, flags);
396 list_for_each_entry(phy, &port->phy_list, port_phy_el)
397 memcpy(phy->attached_sas_addr, dev->sas_addr, SAS_ADDR_SIZE);
398 spin_unlock_irqrestore(&port->phy_list_lock, flags);
399}
400
401#define ATA_IDENTIFY_DEV 0xEC
402#define ATA_IDENTIFY_PACKET_DEV 0xA1
403#define ATA_SET_FEATURES 0xEF
404#define ATA_FEATURE_PUP_STBY_SPIN_UP 0x07
405
406/**
407 * sas_discover_sata_dev -- discover a STP/SATA device (SATA_DEV)
408 * @dev: STP/SATA device of interest (ATA/ATAPI)
409 *
410 * The LLDD has already been notified of this device, so that we can
411 * send FISes to it. Here we try to get IDENTIFY DEVICE or IDENTIFY
412 * PACKET DEVICE, if ATAPI device, so that the LLDD can fine-tune its
413 * performance for this device.
414 */
415static int sas_discover_sata_dev(struct domain_device *dev)
416{
417 int res;
418 __le16 *identify_x;
419 u8 command;
420
421 identify_x = kzalloc(512, GFP_KERNEL);
422 if (!identify_x)
423 return -ENOMEM;
424
425 if (dev->sata_dev.command_set == ATA_COMMAND_SET) {
426 dev->sata_dev.identify_device = identify_x;
427 command = ATA_IDENTIFY_DEV;
428 } else {
429 dev->sata_dev.identify_packet_device = identify_x;
430 command = ATA_IDENTIFY_PACKET_DEV;
431 }
432
433 res = sas_issue_ata_cmd(dev, command, 0, identify_x, 512,
434 PCI_DMA_FROMDEVICE);
435 if (res)
436 goto out_err;
437
438 /* lives on the media? */
439 if (le16_to_cpu(identify_x[0]) & 4) {
440 /* incomplete response */
441 SAS_DPRINTK("sending SET FEATURE/PUP_STBY_SPIN_UP to "
442 "dev %llx\n", SAS_ADDR(dev->sas_addr));
443 if (!le16_to_cpu(identify_x[83] & (1<<6)))
444 goto cont1;
445 res = sas_issue_ata_cmd(dev, ATA_SET_FEATURES,
446 ATA_FEATURE_PUP_STBY_SPIN_UP,
447 NULL, 0, PCI_DMA_NONE);
448 if (res)
449 goto cont1;
450
451 schedule_timeout_interruptible(5*HZ); /* More time? */
452 res = sas_issue_ata_cmd(dev, command, 0, identify_x, 512,
453 PCI_DMA_FROMDEVICE);
454 if (res)
455 goto out_err;
456 }
457cont1:
458 /* Get WWN */
459 if (dev->port->oob_mode != SATA_OOB_MODE) {
460 memcpy(dev->sas_addr, dev->sata_dev.rps_resp.rps.stp_sas_addr,
461 SAS_ADDR_SIZE);
462 } else if (dev->sata_dev.command_set == ATA_COMMAND_SET &&
463 (le16_to_cpu(dev->sata_dev.identify_device[108]) & 0xF000)
464 == 0x5000) {
465 int i;
466
467 for (i = 0; i < 4; i++) {
468 dev->sas_addr[2*i] =
469 (le16_to_cpu(dev->sata_dev.identify_device[108+i]) & 0xFF00) >> 8;
470 dev->sas_addr[2*i+1] =
471 le16_to_cpu(dev->sata_dev.identify_device[108+i]) & 0x00FF;
472 }
473 }
474 sas_hash_addr(dev->hashed_sas_addr, dev->sas_addr);
475 if (!dev->parent)
476 sas_sata_propagate_sas_addr(dev);
477
478 /* XXX Hint: register this SATA device with SATL.
479 When this returns, dev->sata_dev->lu is alive and
480 present.
481 sas_satl_register_dev(dev);
482 */
483 return 0;
484out_err:
485 dev->sata_dev.identify_packet_device = NULL;
486 dev->sata_dev.identify_device = NULL;
487 kfree(identify_x);
488 return res;
489}
490
491static int sas_discover_sata_pm(struct domain_device *dev)
492{
493 return -ENODEV;
494}
495
496int sas_notify_lldd_dev_found(struct domain_device *dev) 161int sas_notify_lldd_dev_found(struct domain_device *dev)
497{ 162{
498 int res = 0; 163 int res = 0;
@@ -525,60 +190,6 @@ void sas_notify_lldd_dev_gone(struct domain_device *dev)
525 190
526/* ---------- Common/dispatchers ---------- */ 191/* ---------- Common/dispatchers ---------- */
527 192
528/**
529 * sas_discover_sata -- discover an STP/SATA domain device
530 * @dev: pointer to struct domain_device of interest
531 *
532 * First we notify the LLDD of this device, so we can send frames to
533 * it. Then depending on the type of device we call the appropriate
534 * discover functions. Once device discover is done, we notify the
535 * LLDD so that it can fine-tune its parameters for the device, by
536 * removing it and then adding it. That is, the second time around,
537 * the driver would have certain fields, that it is looking at, set.
538 * Finally we initialize the kobj so that the device can be added to
539 * the system at registration time. Devices directly attached to a HA
540 * port, have no parents. All other devices do, and should have their
541 * "parent" pointer set appropriately before calling this function.
542 */
543int sas_discover_sata(struct domain_device *dev)
544{
545 int res;
546
547 sas_get_ata_command_set(dev);
548
549 res = sas_notify_lldd_dev_found(dev);
550 if (res)
551 goto out_err2;
552
553 switch (dev->dev_type) {
554 case SATA_DEV:
555 res = sas_discover_sata_dev(dev);
556 break;
557 case SATA_PM:
558 res = sas_discover_sata_pm(dev);
559 break;
560 default:
561 break;
562 }
563 if (res)
564 goto out_err;
565
566 sas_notify_lldd_dev_gone(dev);
567 res = sas_notify_lldd_dev_found(dev);
568 if (res)
569 goto out_err2;
570
571 res = sas_rphy_add(dev->rphy);
572 if (res)
573 goto out_err;
574
575 return res;
576
577out_err:
578 sas_notify_lldd_dev_gone(dev);
579out_err2:
580 return res;
581}
582 193
583/** 194/**
584 * sas_discover_end_dev -- discover an end device (SSP, etc) 195 * sas_discover_end_dev -- discover an end device (SSP, etc)
@@ -685,11 +296,14 @@ static void sas_discover_domain(struct work_struct *work)
685 case FANOUT_DEV: 296 case FANOUT_DEV:
686 error = sas_discover_root_expander(dev); 297 error = sas_discover_root_expander(dev);
687 break; 298 break;
299#ifdef CONFIG_SCSI_SAS_ATA
688 case SATA_DEV: 300 case SATA_DEV:
689 case SATA_PM: 301 case SATA_PM:
690 error = sas_discover_sata(dev); 302 error = sas_discover_sata(dev);
691 break; 303 break;
304#endif
692 default: 305 default:
306 error = -ENXIO;
693 SAS_DPRINTK("unhandled device %d\n", dev->dev_type); 307 SAS_DPRINTK("unhandled device %d\n", dev->dev_type);
694 break; 308 break;
695 } 309 }
@@ -698,9 +312,9 @@ static void sas_discover_domain(struct work_struct *work)
698 sas_rphy_free(dev->rphy); 312 sas_rphy_free(dev->rphy);
699 dev->rphy = NULL; 313 dev->rphy = NULL;
700 314
701 spin_lock(&port->dev_list_lock); 315 spin_lock_irq(&port->dev_list_lock);
702 list_del_init(&dev->dev_list_node); 316 list_del_init(&dev->dev_list_node);
703 spin_unlock(&port->dev_list_lock); 317 spin_unlock_irq(&port->dev_list_lock);
704 318
705 kfree(dev); /* not kobject_register-ed yet */ 319 kfree(dev); /* not kobject_register-ed yet */
706 port->port_dev = NULL; 320 port->port_dev = NULL;
generated by cgit v1.2.2 (git 2.25.0) at 2025-03-09 06:55:23 -0400